La Mesa, California Zip Codes
📍 La Mesa is in San Diego County, California with 4 zip codes; the most populous is 91942.
La Mesa is a USPS city name in San Diego County, California with a Census population of approximately 74,597 across its ZIP codes. San Diego County as a whole has 191 ZIP codes in this directory. Below you'll find every zip code serving La Mesa with population, income and home value, a map, and the city's affordability profile.
Population and demographic data sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code routing data sourced from the United States Postal Service (USPS).
All La Mesa Zip Codes
La Mesa at a Glance
La Mesa has 4 ZIP codes in this directory: 2 standard delivery ZIPs and 2 PO Box or unique ZIPs that carry no resident population in Census data. The 2 ZIPs with published Census housing data cover 74,597 residents, the largest being 91942 with 40,995 people.
The median ZIP in La Mesa has a household income of $94,026 and a home value of $743,900, a price-to-income ratio of 7.9, above the 6.7 California ZIP median. The highest median income is in 91941 at $107,055. Median rent across these ZIPs is $1,838 a month.
54% of households in the typical La Mesa ZIP own their home (statewide ZIP median 64%). 41% of adults hold a bachelor's degree, above the 31% statewide median. The median poverty rate is 10.3%, below the 10.8% statewide ZIP median. Overall density is about 5,328 residents per square mile across 14 square miles of ZIP land area.
Medians are taken across the ZIP codes listed below (each ZIP weighted equally); PO Box and no-data ZIPs are excluded. Definitions on the methodology page; statewide comparisons in the 2026 California ZIP Code Affordability Report.
La Mesa Zip Code Map
Interactive map of La Mesa, California zip codes. Click any marker for details.